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A method for removing soluble organic matter and heavy metal ions in electroplating wastewater

A technology for heavy metal ions and electroplating wastewater, applied in chemical instruments and methods, water pollutants, metallurgical wastewater treatment, etc. Adjustable functions and easy operation

Active Publication Date: 2017-08-15
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main methods of electroplating wastewater treatment: chemical precipitation method, ion exchange method, RO membrane treatment method, electrolysis method, biological method, ultraviolet treatment, evaporation method, etc., generally need to be combined with several methods to meet the national discharge standards, these The method has problems such as complex process, high energy consumption, high cost, large floor area, and difficult operation and management.

Method used

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  • A method for removing soluble organic matter and heavy metal ions in electroplating wastewater
  • A method for removing soluble organic matter and heavy metal ions in electroplating wastewater

Examples

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Effect test

Embodiment 1

[0020] The treatment process of wastewater from an electroplating factory in Guangdong is as follows:

[0021] The electroplating wastewater first enters the pH adjustment tank, the influent pH is 6.5, the aspect ratio of the adjustment tank is 1.5, the residence time is 15 minutes, and the average flow rate is 7 m / s. Industrial calcium hydroxide is added to the pH adjustment tank to adjust the electroplating wastewater. The pool is equipped with a pH meter and an automatic control system to control the pH value of the effluent at 7.7. Then the electroplating wastewater enters the packing tower for removing soluble organic matter and heavy metal ions through the lifting pump. The main function of the packing tower is to remove organic pollutants such as soluble organic matter and inorganic pollutants such as various heavy metal ions in the electroplating wastewater. The packed packed tower is a closed cylinder. The height-to-diameter ratio of the cylinder is 20:1, and the res...

Embodiment 2

[0027] The treatment process of wastewater from an electroplating factory in Jiangsu is as follows:

[0028] The electroplating wastewater first enters the pH adjustment tank, the pH of the influent water is 8.7, the aspect ratio of the adjustment tank is 1.4, the residence time is 10 minutes, and the average flow rate is 7 m / s. Industrial sulfuric acid is added to the pH adjustment tank to adjust the electroplating wastewater. Equipped with a pH meter and an automatic control system to control the pH value of the effluent to 7.9. Then the electroplating wastewater enters the packing tower for removing soluble organic matter and heavy metal ions through the lifting pump. The main function of the packing tower is to remove organic pollutants such as soluble organic matter and inorganic pollutants such as various heavy metal ions in the electroplating wastewater. The packed packed tower is a closed cylinder. The height-to-diameter ratio of the cylinder is 15:1, and the residenc...

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Abstract

The invention discloses a method for removing soluble organic matter and heavy metal ions in electroplating wastewater, which comprises an acid-base regulating tank and a packing tower for efficiently removing soluble organic matter and heavy metal ions. The packing tower uses modified diatomaceous earth and activated carbon as double-layer packing. After being adsorbed by the packing, the electroplating wastewater meets the national discharge standard. The method for treating electroplating wastewater of the invention has high removal rate of organic matter and heavy metal ions, low one-time investment, simple operation and low production and treatment cost, and is an environment-friendly green treatment process for electroplating wastewater.

Description

technical field [0001] The invention belongs to the technical field of water treatment, in particular to a method for efficiently removing soluble organic matter and heavy metal ions in electroplating wastewater. Background technique [0002] Electroplating wastewater refers to the wastewater and waste liquid discharged from the electroplating factory or workshop during the production process. The water quality of electroplating wastewater will vary due to differences in production processes. The main pollutants in electroplating wastewater are soluble organic pollutants and heavy metal ions, such as chromium, nickel, cadmium, etc. Most of the heavy metal ions exist in the form of simple cations, and some are in the form of acid radical anions or complex complex anions In addition, electroplating wastewater generally contains toxic organic additives, such as cyanide. Electroplating wastewater is mostly toxic and harmful. Electroplating wastewater contains heavy metal ions ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/28C02F101/30C02F101/20C02F103/16
Inventor 何丹农董亚梅尹桂林童琴吴晓燕金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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